CN105744345B - Video-frequency compression method and device - Google Patents
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- 239000000284 extracts Substances 0.000 claims abstract description 8
- 230000000875 corresponding Effects 0.000 claims description 33
- 238000001914 filtration Methods 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 8
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- 238000004458 analytical methods Methods 0.000 abstract description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8549—Creating video summaries, e.g. movie trailer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed circuit television systems, i.e. systems in which the signal is not broadcast
Abstract
Description
Technical field
The present invention relates to technical field of video processing more particularly to a kind of video-frequency compression methods and device.
Background technique
With the continuous improvement of computer technology, digital media technology, Online Video monitoring technology, video reads compression skill Art is widely used, and is acted on also more and more important.Video read compress technique be obtained by camera it is all Video simultaneously reads all videos of compression, and the video for reading compression includes the I frame (I-frames) of video, P frame (P-frames) With B frame (B-frames).It is read in compression process carrying out video, it is necessary first to read all video frames in video, then right Each frame video is analyzed in all video frames, in particular it is required that reading the foreground image and background image in video, and right All foreground images are analyzed in video, moving object all in foreground image are extracted, then by all of extraction Moving object sequence saves in memory, finally by these moving object sequence reorganizations to summarized radio space, to reach video The effect of compression.But due to needing to read the moving object in all video frames in carrying out video reading compression, and to institute There is the moving object in video frame to be analyzed, it is therefore desirable to the time for reading analysis is longer, and computation complexity is high, and after compressing Video also saved in memory due to having compressed all video frames, some insignificant information, therefore, cause compressed The memory that video occupies is very big, and the requirement to hardware is very high.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill Art.
Summary of the invention
It is a primary object of the present invention to solve video read read in compression analysis time is longer, compressed video Excessive technical problem.
To achieve the above object, a kind of video-frequency compression method provided by the invention, the described method comprises the following steps:
The I frame in video source file is extracted, I-frame video file is obtained；
Processing is filtered to the I-frame video file, obtains the effective video file for meeting setting condition；
Multiplexed compressed processing is carried out to the effective video file, generates compressed video file.
Preferably, the step of I frame extracted in video source file, acquisition I-frame video file specifically:
The video source file is decomposed into I frame using Deplexing method, the frame group video file that B frame is combined with P frame, mentioned The I frame in the frame group video file is taken, I-frame video file is formed.
Preferably, described that processing is filtered to the I-frame video file, obtain the effective video text for meeting setting condition The step of part includes:
According to several I frame images of the I-frame video file generated；
First I frame image of generation is handled, initial background frame image is obtained；
Each I frame image and the initial background frame image subtraction that first I frame image is generated later, acquisition pair Answer several moving targets in I frame image；
Face datection is carried out to each moving target, the corresponding I frame of moving target for not having face picture is abandoned, it will The corresponding I frame of moving target with face picture is saved；
Effective video file is generated according to the corresponding I frame of the moving target with face picture of preservation.
Preferably, the step of I frame images several according to the I-frame video file generated specifically:
Processing is decoded to the I-frame video file using decoder, generates YUV/RGB video file；Utilize coding Device carries out coded treatment to the YUV/RGB video file of generation, generates several I frame images.
Preferably, described the step of Face datection is carried out to each moving target specifically:
Detect in each moving target whether there is face picture using Adaboost algorithm.
In addition, to achieve the above object, the present invention also provides a kind of device for compressing video, described device includes:
Extraction module obtains I-frame video file for extracting the I frame in video source file；
Filtering module obtains the effective video for meeting setting condition for being filtered processing to the I-frame video file File；
Compression module generates compressed video file for carrying out multiplexed compressed processing to the effective video file.
Preferably, the extraction module is specifically used for:
The video source file is decomposed into I frame using Deplexing method, the frame group video file that B frame is combined with P frame, mentioned The I frame in the frame group video file is taken, I-frame video file is formed.
Preferably, the filtering module includes:
I frame image generation unit, for according to several I frame images of the I-frame video file generated；
Initial background frame image acquisition unit is handled for first I frame image to generation, obtains initial background Frame image；
Moving target acquiring unit, each I frame image for that will generate after first I frame image and described initial Background frames image subtraction obtains several moving targets in corresponding I frame image；
Face datection unit will not have the movement mesh of face picture for carrying out Face datection to each moving target It marks corresponding I frame to abandon, the corresponding I frame of moving target with face picture is saved；
Effective video file generating unit, it is raw for the corresponding I frame of the moving target with face picture according to preservation At effective video file.
Preferably, the I frame image generation unit is specifically used for:
Processing is decoded to the I-frame video file using decoder, generates YUV/RGB video file；Utilize coding Device carries out coded treatment to the YUV/RGB video file of generation, generates several I frame images.
Preferably, the Face datection unit is also used to:
Detect in each moving target whether there is face picture using Adaboost algorithm.
A kind of video-frequency compression method and device proposed by the present invention do not depend on other frames using I frame in video, are to deposit at random The point taken, while being this advantage of decoded reference frame, when reading video, the I frame in video source file is only extracted, is removed superfluous Remaining B frame and P frame forms I-frame video file, and is filtered processing to the I-frame video file and obtains effective video file, The effective video file is compressed to achieve the effect that video compress again, in this way, due to only extracting in video source file I frame be read out and analyze, highly shortened the time for reading analysis, meanwhile, reduce compressed video file Size reduces the memory headroom size that compressed video file occupies.
Detailed description of the invention
Fig. 1 is the flow diagram of one embodiment of video-frequency compression method of the present invention；
Fig. 2 is the refinement flow diagram of step S20 in Fig. 1；
Fig. 3 is the functional block diagram of one embodiment of device of present invention compression video；
Fig. 4 is the refinement the functional block diagram of filtering module 02 in Fig. 3.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of video-frequency compression method.
Referring to Fig.1, Fig. 1 is the flow diagram of one embodiment of video-frequency compression method of the present invention.
In one embodiment, which includes:
Step S10 extracts the I frame in video source file, obtains I-frame video file；
In the present embodiment, video source file can be the video file got in real time by camera, be also possible to pre- The video file first stored, is not limited thereto.It, will be described using demultiplexing (demux) method after getting video source file Video source file is decomposed into the frame group video file of I frame (I-frames), P frame (P-frames) and B frame (B-frames) combination, Wherein, I frame is also key frame, it is the important frame in interframe compression coding；It is the coded frame of full frame compression；When decoding Only with the data of I frame with regard to restructural complete image；I frame is generated without necessarily referring to other pictures.I.e. I frame does not depend on other frames, It is random-access point, while is also decoded reference frame.After the video source file is decomposed, the frame group video is only extracted I frame in file removes the B frame and P frame of redundancy, forms I-frame video file.In this way, the characteristics of using I frame, can sufficiently read The video frame that can embody the video source file characteristic in video source file completely is taken, and can remove from and read extra B frame and P frame Process shortens the read access time of video source file, can read useful video frame faster.
Step S20 is filtered processing to the I-frame video file, obtains the effective video file for meeting setting condition；
Processing is filtered to the I-frame video file obtained from video source file using image processing algorithm, it is available Various detection algorithms in image processing algorithm detect the frame image in I-frame video file, for example, using image at Image segmentation and image zooming-out in adjustment method detect the image in the I-frame video file, are filtered, extract symbol Setting condition namely the I frame comprising useful information are closed, to get the effective video file for meeting setting condition.
Step S30 carries out multiplexed compressed processing to the effective video file, generates compressed video file.
(remux) compression processing is multiplexed to the effective video file for meeting setting condition got, generates compression Video file, to realize the purpose for compressing video source file.
The present embodiment does not depend on other frames using I frame in video, is random-access point, at the same be decoded reference frame this One advantage only extracts the I frame in video source file when reading video, removes the B frame and P frame of redundancy, forms I-frame video text Part, and processing is filtered to the I-frame video file and obtains effective video file, then the effective video file is pressed Contracting is to achieve the effect that video compress, in this way, being read out and analyzing due to only extracting the I frame in video source file, greatly Ground shortens the time for reading analysis, meanwhile, compressed video file size is reduced, compressed video file is reduced The memory headroom size of occupancy.
Specifically, as shown in Fig. 2, above-mentioned steps S20 may include:
Step S201, according to several I frame images of the I-frame video file generated；
The I frame in the frame group video file is extracted, after forming I-frame video file, using decoder (decode) to institute It states I-frame video file and is decoded processing, generate YUV/RGB video file, wherein YUV and RGB is color space, is used for Indicate color；It recycles encoder (encode) to carry out coded treatment to the YUV/RGB video file of generation, generates several I frames Image, wherein I frame image is I frame.
Step S202 handles first I frame image of generation, obtains initial background frame image；
Gaussian Background modeling side in image processing algorithm is utilized to the first I frame image generated in several I frame images Method handles it, obtains initial background frame image.
Step S203, by each the I frame image generated after first I frame image and the initial background frame image phase Subtract, obtains several moving targets in corresponding I frame image；
By each the I frame image generated after first I frame image in several I frame images with the initial background of acquisition Frame image subtraction obtains several moving targets in corresponding I frame image.
Step S204 carries out Face datection to each moving target, will not have the corresponding I of moving target of face picture Frame abandons, and the corresponding I frame of moving target with face picture is saved；
Face datection is carried out to each moving target using Adaboost algorithm, wherein Adaboost algorithm is face Whether a kind of detection algorithm, being detected in each moving target by Adaboost algorithm has face picture.When detecting one When not having face picture in moving target, then the moving target is judged for useless image information, then by the moving target pair The I frame answered abandons；When detecting has face picture in a moving target, then judge that the moving target is believed for useful image Breath, the corresponding I frame of the moving target is saved.
Step S205 generates effective video file according to the corresponding I frame of the moving target with face picture of preservation.
After carrying out Face datection to each moving target by Adaboost algorithm, there is several according to preservation face to draw The corresponding I frame of the moving target in face generates effective video file.In this way, due to all having carried out face inspection to each moving target It surveys, the processing of filtering screening, filters out the corresponding I frame of useless moving target without face picture, what is finally obtained has Imitating in video information is the corresponding I frame of useful moving target with face picture, avoids the interference of garbage, makes It is smaller to obtain the memory that effective video file occupies, fundamentally further reduces and is finally compressed with effective video file Compressed video file size afterwards reduces the memory headroom size that compressed video file occupies.
The present invention further provides a kind of devices for compressing video.
It should be noted that the device of the compression video can be TV, computer, mobile terminal in the embodiment of the present invention Deng the video playback apparatus with playing function, or video processing equipment relevant to video monitoring does not limit herein It is fixed.
Referring to the functional block diagram for one embodiment of device that Fig. 3, Fig. 3 are present invention compression video.
In one embodiment, the device of the compression video includes:
Extraction module 01 obtains I-frame video file for extracting the I frame in video source file；
In the present embodiment, video source file can be the video file got in real time by camera, be also possible to pre- The video file first stored, is not limited thereto.It, will be described using demultiplexing (demux) method after getting video source file Video source file is decomposed into the frame group video file of I frame (I-frames), P frame (P-frames) and B frame (B-frames) combination, Wherein, I frame is also key frame, it is the important frame in interframe compression coding；It is the coded frame of full frame compression；When decoding Only with the data of I frame with regard to restructural complete image；I frame is generated without necessarily referring to other pictures.I.e. I frame does not depend on other frames, It is random-access point, while is also decoded reference frame.After the video source file is decomposed, the frame group video is only extracted I frame in file removes the B frame and P frame of redundancy, forms I-frame video file.In this way, the characteristics of using I frame, can sufficiently read The video frame that can embody the video source file characteristic in video source file completely is taken, and can remove from and read extra B frame and P frame Process shortens the read access time of video source file, can read useful video frame faster.
Filtering module 02 obtains the effective view for meeting setting condition for being filtered processing to the I-frame video file Frequency file；
Processing is filtered to the I-frame video file obtained from video source file using image processing algorithm, it is available Various detection algorithms in image processing algorithm detect the frame image in I-frame video file, for example, using image at Image segmentation and image zooming-out in adjustment method detect the image in the I-frame video file, are filtered, extract symbol Setting condition namely the I frame comprising useful information are closed, to get the effective video file for meeting setting condition.
Compression module 03 generates compressed video file for carrying out multiplexed compressed processing to the effective video file.
(remux) compression processing is multiplexed to the effective video file for meeting setting condition got, generates compression Video file, to realize the purpose for compressing video source file.
The present embodiment does not depend on other frames using I frame in video, is random-access point, at the same be decoded reference frame this One advantage only extracts the I frame in video source file when reading video, removes the B frame and P frame of redundancy, forms I-frame video text Part, and processing is filtered to the I-frame video file and obtains effective video file, then the effective video file is pressed Contracting is to achieve the effect that video compress, in this way, being read out and analyzing due to only extracting the I frame in video source file, greatly Ground shortens the time for reading analysis, meanwhile, compressed video file size is reduced, compressed video file is reduced The memory headroom size of occupancy.
Specifically, as shown in figure 4, above-mentioned filtering module 02 may include:
I frame image generation unit 021, for according to several I frame images of the I-frame video file generated；
Initial background frame image acquisition unit 022 is handled for first I frame image to generation, is obtained initial Background frames image；
Moving target acquiring unit 023, each I frame image for that will generate after first I frame image with it is described Initial background frame image subtraction obtains several moving targets in corresponding I frame image；
Face datection unit 024 will not have the movement of face picture for carrying out Face datection to each moving target The corresponding I frame of target abandons, and the corresponding I frame of moving target with face picture is saved；
Effective video file generating unit 025, for the corresponding I frame of the moving target with face picture according to preservation Generate effective video file.
Specifically, the I frame in the frame group video file is extracted, after forming I-frame video file, utilizes decoder (decode) processing is decoded to the I-frame video file, generates YUV/RGB video file, wherein YUV and RGB is color Color space, for indicating color；Encoder (encode) is recycled to carry out coded treatment to the YUV/RGB video file of generation, Generate several I frame images, wherein I frame image is I frame.
Gaussian Background modeling side in image processing algorithm is utilized to the first I frame image generated in several I frame images Method handles it, obtains initial background frame image.It is each by being generated after first I frame image in several I frame images A I frame image with the initial background frame image subtraction of acquisition, obtains several moving targets in corresponding I frame image, then and first Each the I frame image namely I frame generated after a I frame image is corresponding with a moving target.
Face datection is carried out to each moving target using Adaboost algorithm, wherein Adaboost algorithm is face Whether a kind of detection algorithm, being detected in each moving target by Adaboost algorithm has face picture.When detecting one When not having face picture in moving target, then the moving target is judged for useless image information, then by the moving target pair The I frame answered abandons；When detecting has face picture in a moving target, then judge that the moving target is believed for useful image Breath, the corresponding I frame of the moving target is saved.
After carrying out Face datection to each moving target by Adaboost algorithm, there is several according to preservation face to draw The corresponding I frame of the moving target in face generates effective video file.In this way, due to all having carried out face inspection to each moving target It surveys, the processing of filtering screening, filters out the corresponding I frame of useless moving target without face picture, what is finally obtained has Imitating in video information is the corresponding I frame of useful moving target with face picture, avoids the interference of garbage, makes It is smaller to obtain the memory that effective video file occupies, fundamentally further reduces and is finally compressed with effective video file Compressed video file size afterwards reduces the memory headroom size that compressed video file occupies.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.Pass through above embodiment party The description of formula, it is required general that those skilled in the art can be understood that above-described embodiment method can add by software The mode of hardware platform is realized, naturally it is also possible to which by hardware, but in many cases, the former is more preferably embodiment.It is based on Such understanding, substantially the part that contributes to existing technology can be with software product in other words for technical solution of the present invention Form embody, which is stored in a storage medium (such as ROM/RAM, magnetic disk, CD), including Some instructions are used so that a terminal device (can be mobile phone, computer, server or the network equipment etc.) executes this hair Method described in bright each embodiment.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.
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| CN108040282A (en) * | 2017-12-21 | 2018-05-15 | 山东亿海兰特通信科技有限公司 | A kind of video broadcasting method and device |
| CN108965740B (en) * | 2018-07-11 | 2020-10-30 | 深圳超多维科技有限公司 | Real-time video face changing method, device, equipment and storage medium |
| CN109167977B (en) * | 2018-10-28 | 2020-10-23 | 广州中元软件有限公司 | Bionic long-term storage method for surveillance video |
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